Industrial use what to content the needs of the bimetallic thermometer calibration?

Bimetallic thermometer is a kind of measurement used in industry in the field of low temperature meter, it works with a two or more pieces of metal laminate composed of multilayer metal together, using two different metal expansion degree during temperature change the principle of work. When the temperature changes, the resulting thermal devices the free end of the rotation, drive the thin axis from the Angle of the pointer to the change, on the table card indicating the corresponding temperature. As we all know, in order to ensure the accuracy of the measured value, the bimetallic thermometer should be used in industry preventive maintenance, repair cycle usually for one year. Today let's say it's maintenance content. Bimetallic thermometer used in industry of maintenance content mainly includes the following three aspects: the content of the 1 check the bimetallic thermometer indicates whether normal, its installation site should not have severe vibration instructions to influence greatly the shaking and so on. 2 check the certificate of approval of the bimetallic thermometer for, and whether certificate expired. 3 check the various parts of the thermometer. Parts should be assembled firmly, no influence on the performance measurement of corrosion, header with the protection of the glass or other, etc.